There are no differences between a primary and secondary xylem. Scientists usually only use this term when comparing two experiments to do with xylems. Hope this helps you :)
the difference between primary and secondary succession is that primary succession is the wipeout of something and then secondary succession is the regrowth.
Primary Means, it is individual there is no dependence, But Secondary will allays depends on Primary, If you want to do Secondary, you should complete primary first, There is no precondition to...
Primary colors are the three basic colors red yellow and blue.
Secondary colors are created when primary colors are mixed for example: green (blue yellow) purple (red blue) orange (red yellow)
Insomnia, as most chronic or acte conditions has two major categories. Primary Insomnia is difficulty getting to sleep, staying asleep or waking up too early with no apparent reason (idiopathic)....